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A047185 as a simple table

na(n)
10
20
30
41
54
68
720
830
963
1086
11182
12245
13560
14756
151784
162387
175600
187400
1917336
2022737
2153850
2270390
23168610
24219791
25529529
26688051
271662907
282154347
295225636
306754580
3116451036
3221225758
3351878873
3466826712

[0,0,0,1,4,8,20,30,63,86,182,245,560,756,1784,
 2387,5600,7400,17336,22737,53850,70390,168610,
 219791,529529,688051,1662907,2154347,5225636,
 6754580,16451036,21225758,51878873,66826712]